A feeding device for preparing food-grade potassium chloride

Abstract

A feeding device for preparing food-grade potassium chloride belongs to the technical field of potassium chloride transportation. It is designed to solve the problems of complex internal structure and high equipment cost of existing feeding devices. The invention comprises a feeding bin and a discharge pipe arranged at the bottom of the feeding bin. A movable plate is slidably connected inside the discharge pipe. When a telescopic cylinder is extended, it drives a rack to move upward. Through the adsorption effect of a magnetic block and the cooperation between a tooth block and a ratchet groove, the movable plate and a fixed block descend, thereby determining the volume of supplied potassium chloride, that is, the volume between the movable plate and the upper part of the discharge pipe. When the movable plate moves to a preset position, the telescopic cylinder is extended again, so that the rack moves upward again, and then the valve plate is pushed to move through an extrusion structure, so that the feeding bin and the discharge pipe are connected internally, potassium chloride enters the discharge pipe until a predetermined space is filled, and then the telescopic cylinder is retracted and the valve plate is closed. The whole process realizes precise control of the potassium chloride supply amount, and the structure is simple and the equipment cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of potassium chloride transportation, in particular to a feeding device for preparing food-grade potassium chloride. Background Art

[0002] Food-grade potassium chloride is mainly made by dissolving, removing impurities, filtering and evaporating and crystallizing industrial potassium chloride. At room temperature, the solubility of potassium chloride in water is relatively high, about 34 grams per 100 grams of water. Before the dissolution step, potassium chloride needs to be weighed and fed according to the proportion of water.

[0003] There are two main types of feeding devices currently available, one is feeding by volume, and the other is feeding by weight. Since the solubility of potassium chloride is affected by temperature, and in order to avoid waste of potassium chloride during the dissolution process, potassium chloride solution with too high concentration is generally not configured, so both feeding devices can be used for potassium chloride feeding. However, the structure of the existing potassium chloride feeding device is relatively complex, and it needs to rely on the cooperation of volume measurement or weighing system and drive structure to complete, and the overall equipment cost is relatively high. Summary of the invention

[0004] The object of the present invention is to provide a feeding device for preparing food-grade potassium chloride, which solves the problems of complex internal structure and high equipment cost of the existing feeding device in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a feeding device for preparing food-grade potassium chloride, comprising a feeding bin and a discharge pipe arranged at the bottom of the feeding bin, and the discharge pipe is communicated with the inside of the feeding bin, the inside of the discharge pipe is slidably connected with a movable plate, the inside of the feeding bin is filled with potassium chloride, the inside of the discharge pipe is located in the area above the movable plate for containing potassium chloride, telescopic cylinders are fixedly installed on both sides of the outside of the discharge pipe, a fixed block is fixedly installed between the output end of the telescopic cylinder and the outer wall of the movable plate, and the fixed block extends inward from the outer side of the discharge pipe, a tooth block is movably arranged inside the fixed block, and racks are also arranged on both sides of the outside of the discharge pipe, the racks penetrate the fixed block up and down and are slidably connected with the fixed block, a second ratchet groove is arranged on the outside of the rack, and the inner side of the tooth block corresponds to the second ratchet groove; An extrusion structure is also provided on the upper outer side of the discharge pipe, an extrusion block and a second magnetic block are movably provided inside the extrusion structure, an inclined surface corresponding to the extrusion block is provided on the top of the rack, a first magnetic block is fixedly installed on the side of the rack, and the first magnetic block corresponds to the second magnetic block, valve plates are movably provided on both sides of the upper inner side of the discharge pipe, the valve plates are used to cut off the communication between the feed bin and the inside of the discharge pipe, the valve plates are fixedly connected to the extrusion block through a connecting rod, an extrusion frame is fixedly installed on the lower outer side of the discharge pipe, and the extrusion frame corresponds to the lower side of the tooth block; When the telescopic cylinder is extended, it drives the rack to move upward. When the first magnetic block on the rack is adsorbed by the second magnetic block, the telescopic cylinder retracts. At this time, the rack is adsorbed and fixed, and the movable plate and the fixed block descend. When the movable plate and the fixed block descend to the preset position, that is, when the upper volume inside the movable plate reaches the preset position, the telescopic cylinder briefly extends upward, and the rack moves upward again. The inclined surface squeezes the extrusion block, so that the extrusion block drives the connecting rod and the valve plate to move outward, and the two sets of valve plates move away from each other, and the feeding bin and the discharge pipe are connected internally. Then the telescopic cylinder retracts again, and the two sets of valve plates merge and close.

[0006] Furthermore, a feed port is provided at the top of the discharge pipe, a sealing groove is provided on the upper part of the discharge pipe, and the sealing groove is connected to the feed port, the top of the feed port is connected to the feeding bin, the valve plate is slidably provided inside the sealing groove, sliding grooves are provided on both sides above the inside of the discharge pipe, the sliding grooves are connected to the inside of the sealing groove, and the connecting rod is slidably connected to the inside of the sliding groove.

[0007] Furthermore, movable grooves are provided on both sides of the discharge pipe, and the movable grooves are used for the sliding of the fixed block. A sealing mechanism is provided above the interior of the movable groove, and the sealing mechanism is used to prevent potassium chloride inside the discharge pipe from leaking from the movable groove. The sealing mechanism includes a first sealing sheet fixedly connected above the movable groove, and also includes a second sealing sheet and a third sealing sheet slidably arranged inside the movable groove. The inner sides of the first sealing sheet and the second sealing sheet are provided with sliding grooves, and the outer sides of the second sealing sheet and the third sealing sheet are provided with sliding blocks corresponding to the sliding grooves, wherein the third sealing sheet is fixedly connected to the top of the fixed block, and when the fixed block rises or falls, the area inside the movable groove located above the fixed block is blocked under the action of the first sealing sheet, the second sealing sheet and the third sealing sheet.

[0008] Furthermore, the bottom of the movable plate is funnel-shaped, and a discharge port is provided at the bottom of the movable plate. A fixing frame is fixedly installed at the bottom of the movable plate, and a trigger rod is penetrated on the fixing frame. A blocking block is provided on the top of the trigger rod, and the blocking block is used to block the discharge port. A fixing rod corresponding to the bottom of the blocking block is fixedly connected to the inner side of the bottom of the discharge pipe, and an inner sleeve is fixedly installed on the top of the fixing frame. An outer sleeve is fixedly installed on the outside of the trigger rod, and the outer sleeve is wrapped around the outside of the inner sleeve and is slidably connected to the inner sleeve. A first return spring is fixedly installed between the inner sleeve and the outer sleeve. Under normal conditions, the blocking block closes the discharge port. When the movable plate moves downward to the lowest position inside the discharge pipe, the trigger rod contacts the fixed rod, so that the trigger rod cannot continue to move. At this time, when the movable plate continues to move downward, the blocking block cannot close the discharge port, and the potassium chloride powder above the movable plate falls from the discharge port to complete the feeding.

[0009] Furthermore, the fixed block is provided with through grooves above and below, the rack is slidably connected in the through groove, the bottom of the rack is also fixedly connected to a limiting block, a preset groove is also provided inside the fixed block, the tooth block is slidably arranged in the preset groove, wherein a first ratchet groove is provided on the side of the tooth block close to the rack, a triangular block is installed below the tooth block, the triangular block corresponds to the top of the extrusion frame, the second ratchet groove, the first ratchet groove and the cross-section of the triangular block are all right triangles, a first compression spring is fixedly installed between the inner wall of the preset groove and the tooth block, the tooth block is stuck on the second ratchet groove so that the rack can only move upward but not downward, when the telescopic cylinder drives the fixed block down to the position where the extrusion frame contacts the triangular block, as the telescopic cylinder retracts, the triangular block is squeezed by the extrusion frame, so that the tooth block moves away from the rack, and the rack is not restricted by the tooth block and can fall by gravity.

[0010] Furthermore, the second magnetic block is slidably arranged at the lower part of the interior of the shell, and a second compression spring is fixedly installed between the second magnetic block and the interior of the shell, the cross-section of the extrusion block is a right-angled trapezoid, the lower inclined surface of the extrusion block corresponds to the inclined surface, and a second return spring is fixedly connected between the interior of the shell and the extrusion block. When the extrusion block is not subjected to external force, the second return spring applies pressure so that the two groups of valve plates are always in a closed state.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a feeding device for preparing food-grade potassium chloride. The feeding device can accurately realize the quantitative supply of potassium chloride through the cooperation of a telescopic cylinder, a fixed block, a rack, an extrusion frame, an extrusion structure and a valve plate. When the telescopic cylinder is extended, the rack is driven to move upward. Through the adsorption effect of the magnetic block and the cooperation between the rack block and the ratchet groove, the movable plate and the fixed block descend, thereby determining the volume of the supplied potassium chloride, that is, the volume between the movable plate and the upper part of the inside of a discharge pipe. When the movable plate moves to a preset position, the telescopic cylinder is extended again, so that the rack moves upward again, and then the valve plate is pushed to move through the extrusion structure, so that the feeding bin and the inside of the discharge pipe are connected, and potassium chloride enters the inside of the discharge pipe until the predetermined space is filled. Then the telescopic cylinder is retracted and the valve plate is closed. The whole process realizes the accurate control of the supply amount of potassium chloride, and the structure is simple and the equipment cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the discharge pipe part of the present invention; Figure 3 It is a partial structural cross-sectional view of the discharge pipe of the present invention; Figure 4 This is a partial structural diagram of the discharge pipe of the present invention; Figure 5 An exploded view of the sealing mechanism structure of the present invention; Figure 6 It is a schematic diagram of the movable plate, telescopic cylinder, fixed block, rack, extrusion structure and valve plate of the present invention; Figure 7 It is a cross-sectional view of the movable plate structure of the present invention; Figure 8 It is an exploded view of the telescopic cylinder, the fixed block and the rack structure of the present invention; Fig. 9 It is an exploded view of the rack extrusion structure and valve plate structure of the present invention.

[0013] In the figure: 1, feeding bin; 2, discharge pipe; 21, feed port; 22, movable groove; 23, sealing mechanism; 231, first sealing sheet; 232, second sealing sheet; 233, third sealing sheet; 234, slide groove; 235, slider; 24, sealing groove; 25, sliding groove; 26, fixing rod; 3, movable plate; 31, discharge port; 32, fixing frame; 321, inner sleeve; 33, first return spring; 34, blocking block; 35, trigger rod; 351, outer sleeve; 4 , telescopic cylinder; 5, fixed block; 51, through groove; 52, preset groove; 53, tooth block; 531, first ratchet groove; 532, triangular block; 54, first compression spring; 6, rack; 61, second ratchet groove; 62, limit block; 63, first magnetic block; 64, inclined surface; 7, extrusion frame; 8, extrusion structure; 81, shell; 82, extrusion block; 83, second return spring; 84, second magnetic block; 85, second compression spring; 9, valve plate; 91, connecting rod. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] In order to solve the technical problems of complex internal structure and high equipment cost of existing feeding devices, such as Figure 1-Figure 9 As shown, the following preferred technical solutions are provided: like Figure 1-Figure 2 As shown, a feeding device for preparing food-grade potassium chloride includes a feeding bin 1 and a discharge pipe 2 arranged at the bottom of the feeding bin 1, and the discharge pipe 2 is connected to the inside of the feeding bin 1, as shown in FIG. Figure 3 As shown, the inside of the discharge pipe 2 is slidably connected with a movable plate 3, the inside of the feeding bin 1 is filled with potassium chloride, the inside of the discharge pipe 2 is located above the movable plate 3 and is used to hold potassium chloride, and telescopic cylinders 4 are fixedly installed on both sides of the outside of the discharge pipe 2, and a fixed block 5 is fixedly installed between the output end of the telescopic cylinder 4 and the outer wall of the movable plate 3, and the fixed block 5 extends inward from the outer side of the discharge pipe 2, as shown in FIG. Figure 8-Figure 9 As shown, a tooth block 53 is movably provided inside the fixed block 5, and racks 6 are also provided on both sides of the outside of the discharge pipe 2. The rack 6 passes through the fixed block 5 up and down and is slidably connected to the fixed block 5. A second ratchet groove 61 is provided on the outer side of the rack 6, and the inner side of the tooth block 53 corresponds to the second ratchet groove 61; An extrusion structure 8 is also provided above the outer side of the discharge pipe 2, and an extrusion block 82 and a second magnetic block 84 are movably provided inside the extrusion structure 8. An inclined surface 64 corresponding to the extrusion block 82 is provided on the top of the rack 6, and a first magnetic block 63 is fixedly installed on the side of the rack 6, and the first magnetic block 63 corresponds to the second magnetic block 84. Figure 3-Figure 4 As shown, valve plates 9 are movably provided on both sides of the upper part of the discharge pipe 2, and the valve plates 9 are used to cut off the communication state between the feeding bin 1 and the inside of the discharge pipe 2. The valve plate 9 is fixedly connected to the extrusion block 82 through a connecting rod 91, and an extrusion frame 7 is fixedly installed on the lower part of the outer side of the discharge pipe 2, and the extrusion frame 7 corresponds to the lower part of the tooth block 53; when the telescopic cylinder 4 is extended, the rack 6 is driven to move upward, and when the first magnetic block 63 on the rack 6 is adsorbed by the second magnetic block 84, the telescopic cylinder 4 is retracted, and the rack 6 is adsorbed and fixed at this time, and the movable plate 3 and the fixed block 5 are lowered. When the movable plate 3 and the fixed block 5 are lowered to the preset position, that is, when the upper volume of the movable plate 3 reaches the preset position, the telescopic cylinder 4 is briefly extended upward, and the rack 6 moves upward again, and the inclined surface 64 squeezes the extrusion block 82, so that the extrusion block 82 drives the connecting rod 91 and the valve plate 9 to move outward, and the two groups of valve plates 9 move away from each other, and the feeding bin 1 and the discharge pipe 2 are connected. Then the telescopic cylinder 4 is retracted again, and the two groups of valve plates 9 are merged and closed.

[0016] like Figure 3-Figure 4 As shown, a feed port 21 is provided at the top of the discharge pipe 2, a sealing groove 24 is provided on the upper part of the interior of the discharge pipe 2, and the sealing groove 24 is communicated with the feed port 21, the top of the feed port 21 is communicated with the feeding bin 1, the valve plate 9 is slidably provided inside the sealing groove 24, sliding grooves 25 are provided on both sides above the interior of the discharge pipe 2, the sliding groove 25 is communicated with the interior of the sealing groove 24, and the connecting rod 91 is slidably connected inside the sliding groove 25.

[0017] like Figure 4-Figure 5 As shown, movable grooves 22 are provided on both sides of the discharge pipe 2, and the movable grooves 22 are used for the sliding of the fixed block 5. A sealing mechanism 23 is provided above the inside of the movable groove 22, and the sealing mechanism 23 is used to prevent the potassium chloride inside the discharge pipe 2 from leaking from the movable groove 22. The sealing mechanism 23 includes a first sealing sheet 231 fixedly connected above the movable groove 22, and also includes a second sealing sheet 232 and a third sealing sheet 233 slidably arranged inside the movable groove 22. The inner sides of the first sealing sheet 231 and the second sealing sheet 232 are provided with a slide groove 234, and the outer sides of the second sealing sheet 232 and the third sealing sheet 233 are provided with a slider 235 corresponding to the slide groove 234, wherein the third sealing sheet 233 is fixedly connected to the top of the fixed block 5. When the fixed block 5 rises or falls, under the action of the first sealing sheet 231, the second sealing sheet 232 and the third sealing sheet 233, the area inside the movable groove 22 located above the fixed block 5 is blocked.

[0018] like Figure 6-Figure 7As shown, the bottom of the movable plate 3 is funnel-shaped, and a discharge port 31 is provided at the bottom of the movable plate 3. A fixing frame 32 is fixedly installed at the bottom of the movable plate 3. A trigger rod 35 is penetrated through the fixing frame 32. A blocking block 34 is provided on the top of the trigger rod 35. The blocking block 34 is used to block the discharge port 31. Figure 3 As shown, a fixing rod 26 corresponding to the bottom of the blocking block 34 is fixedly connected to the inner side of the bottom of the discharge pipe 2, an inner sleeve 321 is fixedly installed on the top of the fixing frame 32, and an outer sleeve 351 is fixedly installed on the outside of the trigger rod 35. The outer sleeve 351 is wrapped around the outside of the inner sleeve 321 and is slidably connected to the inner sleeve 321. A first return spring 33 is fixedly installed between the inner sleeve 321 and the outer sleeve 351. Under normal conditions, the blocking block 34 closes the discharge port 31. When the movable plate 3 moves downward to the lowest position inside the discharge pipe 2, the trigger rod 35 contacts the fixing rod 26, so that the trigger rod 35 cannot continue to move. At this time, when the movable plate 3 continues to move downward, the blocking block 34 cannot close the discharge port 31, and the potassium chloride powder above the movable plate 3 falls from the discharge port 31 to complete the feeding.

[0019] like Figure 8 As shown, the fixed block 5 is provided with a through groove 51 extending from top to bottom, the rack 6 is slidably connected in the through groove 51, the bottom of the rack 6 is also fixedly connected to the limit block 62, the fixed block 5 is also provided with a preset groove 52, the tooth block 53 is slidably arranged in the preset groove 52, wherein the tooth block 53 is provided with a first ratchet groove 531 on the side close to the rack 6, a triangular block 532 is installed below the tooth block 53, the triangular block 532 corresponds to the top of the extrusion frame 7, the second ratchet groove 61, the first ratchet groove 531 and the triangular block 5 The cross sections of 32 are all right triangles. A first compression spring 54 is fixedly installed between the inner wall of the preset groove 52 and the tooth block 53. The tooth block 53 is stuck on the second ratchet groove 61 so that the rack 6 can only move upward and cannot move downward. When the telescopic cylinder 4 drives the fixed block 5 to descend to the position where the extrusion frame 7 contacts the triangular block 532, as the telescopic cylinder 4 retracts, the triangular block 532 is squeezed by the extrusion frame 7, so that the tooth block 53 moves away from the rack 6, and the rack 6 is not restricted by the tooth block 53 and can fall by gravity.

[0020] like Fig. 9 As shown, the second magnetic block 84 is slidably arranged at the lower part of the interior of the shell 81, and a second compression spring 85 is fixedly installed between the second magnetic block 84 and the interior of the shell 81, the cross-section of the extrusion block 82 is a right-angled trapezoid, the lower inclined surface of the extrusion block 82 corresponds to the inclined surface 64, and a second return spring 83 is fixedly connected between the interior of the shell 81 and the extrusion block 82. When the extrusion block 82 is not subjected to external force, the second return spring 83 applies pressure so that the two groups of valve plates 9 are always in a closed state.

[0021] Specifically, when potassium chloride needs to be supplied, the supply volume is first determined, that is, the volume between the movable plate 3 and the upper part of the inner portion of the discharge pipe 2. The telescopic cylinder 4 is started to extend to the maximum range, so that the first magnetic block 63 is adsorbed by the second magnetic block 84. The telescopic cylinder 4 retracts to move the movable plate 3 and the fixed block 5 downward. When the fixed block 5 moves downward, the rack 6 is adsorbed and fixed by the first magnetic block 63 and the second magnetic block 84 and no longer moves downward. When the movable plate 3 moves to the specified position, the telescopic cylinder 4 is extended again. At this time, under the action of the tooth block 53, the rack 6 moves upward, the second compression spring 85 is compressed, and the extrusion block 82 is squeezed and moved by the inclined surface 64. The two sets of valve plates 9 move away from each other, and the feeding bin 1, the potassium chloride inside enters the discharge pipe 2 until it fills the space above the movable plate 3 and the inside of the discharge pipe 2, then the telescopic cylinder 4 begins to retract, and the rack 6 returns to the position where it is adsorbed and fixed by the first magnetic block 63 and the second magnetic block 84. When the telescopic cylinder 4 retracts to the shortest state, under the action of the limit block 62, the first magnetic block 63 and the second magnetic block 84 on the rack 6 are forced to separate, and the triangular block 532 is squeezed by the squeezing frame 7 to move the rack 53, and the rack 6 falls by its own weight. After the movable plate 3 falls, the trigger rod 35 is blocked by the fixed rod 26, and the blocking block 34 no longer blocks the discharge port 31, and the potassium chloride inside the discharge pipe 2 falls from the discharge port 31 to complete the quantitative supply of potassium chloride.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A feeding device for preparing food-grade potassium chloride, comprising a feeding bin (1) and a discharge pipe (2) arranged at the bottom of the feeding bin (1), wherein the discharge pipe (2) is connected to the inside of the feeding bin (1), characterized in that: The inside of the discharge pipe (2) is slidably connected with a movable plate (3), the inside of the feeding bin (1) contains potassium chloride, the inside of the discharge pipe (2) is located above the movable plate (3) for containing potassium chloride, telescopic cylinders (4) are fixedly installed on both sides of the outside of the discharge pipe (2), a fixed block (5) is fixedly installed between the output end of the telescopic cylinder (4) and the outer wall of the movable plate (3), and the fixed block (5) extends inward from the outer side of the discharge pipe (2), a tooth block (53) is movably arranged inside the fixed block (5), and racks (6) are also arranged on both sides of the outside of the discharge pipe (2), the racks (6) penetrate the fixed block (5) up and down and are slidably connected to the fixed block (5), and a second ratchet groove (61) is arranged on the outer side of the rack (6), and the inner side of the tooth block (53) corresponds to the second ratchet groove (61); An extrusion structure (8) is also provided on the upper outer side of the discharge pipe (2), and an extrusion block (82) and a second magnetic block (84) are movably provided inside the extrusion structure (8). An inclined surface (64) corresponding to the extrusion block (82) is provided on the top of the rack (6), and a first magnetic block (63) is fixedly installed on the side of the rack (6), and the first magnetic block (63) corresponds to the second magnetic block (84). Valve plates (9) are movably provided on both sides of the upper inner side of the discharge pipe (2), and the valve plates (9) are used to cut off the communication state between the feed bin (1) and the inside of the discharge pipe (2). The valve plate (9) is fixedly connected to the extrusion block (82) via a connecting rod (91). An extrusion frame (7) is fixedly installed on the lower outer side of the discharge pipe (2), and the extrusion frame (7) corresponds to the lower side of the tooth block (53).

2. A feeding device for preparing food-grade potassium chloride as claimed in claim 1, characterized in that: The top of the discharge pipe (2) is provided with a feed port (21), a sealing groove (24) is provided above the inside of the discharge pipe (2), and the sealing groove (24) is connected to the feed port (21), the top of the feed port (21) is connected to the feed bin (1), and the valve plate (9) is slidably arranged inside the sealing groove (24).

3. A feeding device for preparing food-grade potassium chloride as claimed in claim 2, characterized in that: Sliding grooves (25) are provided on both sides of the upper part of the discharge pipe (2), the sliding grooves (25) are communicated with the inside of the sealing groove (24), and the connecting rod (91) is slidably connected inside the sliding grooves (25).

4. A feeding device for preparing food-grade potassium chloride as claimed in claim 1, characterized in that: Movable grooves (22) are provided on both sides of the discharge pipe (2), the movable grooves (22) are used for the sliding of the fixed block (5), and a sealing mechanism (23) is provided above the inside of the movable grooves (22), the sealing mechanism (23) is used to prevent potassium chloride inside the discharge pipe (2) from leaking from the movable grooves (22).

5. A feeding device for preparing food-grade potassium chloride as claimed in claim 4, characterized in that: The sealing mechanism (23) comprises a first sealing sheet (231) fixedly connected above the movable groove (22), and also comprises a second sealing sheet (232) and a third sealing sheet (233) slidably arranged inside the movable groove (22), wherein the inner side surfaces of the first sealing sheet (231) and the second sealing sheet (232) are provided with sliding grooves (234), and the outer side surfaces of the second sealing sheet (232) and the third sealing sheet (233) are provided with sliding blocks (235) corresponding to the sliding grooves (234), wherein the third sealing sheet (233) is fixedly connected to the top of the fixed block (5).

6. A feeding device for preparing food-grade potassium chloride as claimed in claim 1, characterized in that: The bottom of the movable plate (3) is funnel-shaped, and a discharge port (31) is provided at the bottom of the movable plate (3). A fixing frame (32) is fixedly mounted at the bottom of the movable plate (3), and a trigger rod (35) is provided through the fixing frame (32). A blocking block (34) is provided on the top of the trigger rod (35), and the blocking block (34) is used to block the discharge port (31). A fixing rod (26) corresponding to the bottom of the blocking block (34) is fixedly connected to the inner side of the bottom of the discharge pipe (2).

7. A feeding device for preparing food-grade potassium chloride as claimed in claim 6, characterized in that: An inner sleeve (321) is fixedly mounted on the top of the fixing frame (32), an outer sleeve (351) is fixedly mounted on the outside of the trigger rod (35), the outer sleeve (351) is wrapped around the outside of the inner sleeve (321) and is slidably connected to the inner sleeve (321), and a first return spring (33) is fixedly mounted between the inner sleeve (321) and the outer sleeve (351).

8. A feeding device for preparing food-grade potassium chloride as claimed in claim 1, characterized in that: The fixed block (5) is provided with a through groove (51) extending therethrough from top to bottom, the rack (6) is slidably connected in the through groove (51), the bottom of the rack (6) is also fixedly connected to a limit block (62), a preset groove (52) is further provided inside the fixed block (5), a tooth block (53) is slidably provided in the preset groove (52), wherein a first ratchet groove (531) is provided on a side of the tooth block (53) close to the rack (6), a triangular block (532) is installed below the tooth block (53), the triangular block (532) corresponds to the top of the extrusion frame (7), the second ratchet groove (61), the first ratchet groove (531) and the triangular block (532) are all right triangles in cross section, and a first compression spring (54) is fixedly installed between the inner wall of the preset groove (52) and the tooth block (53).

9. A feeding device for preparing food-grade potassium chloride as claimed in claim 1, characterized in that: The second magnetic block (84) is slidably disposed at the lower interior of the housing (81), and a second compression spring (85) is fixedly mounted between the second magnetic block (84) and the interior of the housing (81).

10. A feeding device for preparing food-grade potassium chloride according to claim 1, characterized in that: The cross section of the extrusion block (82) is in the form of a right-angled trapezoid; the lower inclined surface of the extrusion block (82) corresponds to the inclined surface (64); and a second return spring (83) is fixedly connected between the interior of the housing (81) and the extrusion block (82).

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